// OID length claims more than available
                Arguments.of("oid length exceeds buffer", new byte[] { 0x04, 0x01, 0x00, 0x10, 0x06 }, IllegalArgumentException.class),

                // Missing NAME_LEN (not enough bytes for 4-byte length)
                Arguments.of("missing NAME_LEN bytes", new byte[] { 0x04, 0x01, 0x00, (byte) der.length, der[0] },

     *
     * @param data The data.
     * @param offset The starting offset at which the SMB header begins.
     * @param length The length of the SMB data starting at offset.
     */
    void sign(final byte[] data, final int offset, final int length, final ServerMessageBlock request, final ServerMessageBlock response) {
        request.signSeq = signSequence;
        if (response != null) {

        assertEquals(32, derived1.length, "Derived key should have correct length");
        assertEquals(32, derived2.length, "Derived key should have correct length");
        assertEquals(32, derived3.length, "Derived key should have correct length");

        assertFalse(Arrays.equals(derived1, derived2), "Different labels should produce different keys");

        // Test with buffer and length larger than needed
        byte[] buffer = new byte[100];

        // Fill test pattern
        for (int i = 0; i < buffer.length; i++) {
            buffer[i] = (byte) (i % 256);
        }

        int bytesConsumed = response.decode(buffer, 0, 50);

        assertEquals(28, bytesConsumed, "Should consume exactly 28 bytes regardless of extra length");

            System.arraycopy(commentBytes, 0, buffer, commentOffset, commentBytes.length);
            buffer[commentOffset + commentBytes.length] = 0;
            commentOffset += commentBytes.length + 1;
        }

        // Read the data
        int bytesRead = response.readDataWireFormat(buffer, 0, buffer.length);

        // Verify results
        assertTrue(bytesRead > 0);

        int byteCountValue = 8 + domainBytes.length;
        setByteCount(response, byteCountValue);
        byte[] buffer = new byte[byteCountValue];
        int bufferIndex = 0;
        byte[] key = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
        System.arraycopy(key, 0, buffer, bufferIndex, key.length);
        bufferIndex += key.length;

        byte[] buf = new byte[10];
        assertEquals(0, cmd.readSetupWireFormat(buf, 0, buf.length));
        assertEquals(0, cmd.readParametersWireFormat(buf, 0, buf.length));
        assertEquals(0, cmd.readDataWireFormat(buf, 0, buf.length));
    }

    @ParameterizedTest
    @CsvSource({ "0, 0", // all zeros
            "-1, 2147483647", // negative fid, max positive security

            out.write(testContent.getBytes("UTF-8"));
        }

        assertTrue(file.exists(), "File should exist after writing");
        assertEquals(testContent.length(), file.length(), "File length should match content length");

        // Read content back
        try (InputStream in = file.getInputStream()) {
            String readContent = new String(in.readAllBytes(), "UTF-8");

            assertNotNull(context);
            assertArrayEquals(ciphers, context.getCiphers());
            assertEquals(0, context.getCiphers().length);
        }

        @Test
        @DisplayName("Should create instance with default constructor")
        void testDefaultConstructor() {
            EncryptionNegotiateContext context = new EncryptionNegotiateContext();

        if (buf[0] != 5 || buf[1] != 0) {
            throw new IOException("Unexpected DCERPC PDU header");
        }

        final int length = Encdec.dec_uint16le(buf, 8);
        if (length > getMaxRecv()) {
            throw new IOException("Unexpected fragment length: " + length);
        }

        while (off < length) {
            final int r = this.handle.recv(buf, off, length - off);